In this case it’s even possible to check other characteristics. For instance when the key was created.

Step 4: Checking the signature

– Click on the Trayicon of WinPT and select “File Manager”
– Click on File > Open to load the signature(s ) or drag and drop them into the window
– On multiple files, select those that should be processed
– Click on File > Check

Now the GUI shows an window that tells you,

– which signatures have been checked,
– if those signatures are valid,
– when the signatures have been made,
– what level of trust is set for each key,
– who is the owner of the key

Checking newer versions of the TorBrowserBundle or other bundles requires only Step 4.